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Siemens - 1-Chip-VPS-Decoder

Numéro de référence SDA5642
Description 1-Chip-VPS-Decoder
Fabricant Siemens 
Logo Siemens 





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SDA5642 fiche technique
SDA 5642
SDA 5642X
1-Chip-VPS-Decoder
Preliminary Data
Features
µC suitable VPS data editing direct from CVBS signal
n-channel MOS
Generating of the line synchronous 5-MHz clock for
the time base and data clock by means of PLL operation
Very few external components necessary
Adaptative data separation
Frame signal recognition
Decoder for line 16
Bi-phase and start code checking
I2C-Bus interface
Operating voltage: 5 V
Video input signal level 1 … 2.0 Vpp
SDA 5642
SDA 5642X
MOS IC
P-DIP-14-1
P-DSO-20-1
Type
SDA 5642
SDA 5642X
Ordering Code
Q67100-H8547
Q67100-H8637
Package
P-DIP-14-1
P-DSO-20-1
Functional Description
The MOS circuit SDA 5642 is used to retrieve the required data for the Video Program System
(VPS) service from the data line No. 16 which is included in the CVBS signal. These data are
decoded according to the specification given in "Richtlinie ARD/ZDF Nr. 8 R 2".
This circuit incorporates the digital functions of the VPS decoder SDA 5640 and the analog
functions of the video processor SDA 5232 on one chip. Together with a reduced number of
external components this chip is a low cost solution for the VPS detector. The single chip
solution can retrieve the data from line 16 of the CVBS signal. These data are decoded,
checked for transmission errors and are stored in registers for further processing by a
microcontroller. The I2C-Bus interface is used for communication of a microcontroller with the
VPS-decoder.
The recording of programs by a VTR is controlled by the VPS label, a program related dataco-
de which accompanies each TV program during its transmission.
As a result the circuit prevents errors in the recording, as can be seen when using the timer
control, when programs are delayed, or are longer than expected.
Semiconductor Group
5
12.94
Free Datasheet http://www.datasheet4u.com/

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